131132121012221 has 32 divisors (see below), whose sum is σ = 151160404082688. Its totient is φ = 111429001857600.

The previous prime is 131132121012203. The next prime is 131132121012223. The reversal of 131132121012221 is 122210121231131.

It is not a de Polignac number, because 131132121012221 - 2¹⁸ = 131132120750077 is a prime.

It is a super-2 number, since 2×131132121012221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131132121012223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7875321746 + ... + 7875338396.

It is an arithmetic number, because the mean of its divisors is an integer number (4723762627584).

Almost surely, 2^{131132121012221} is an apocalyptic number.

It is an amenable number.

131132121012221 is a deficient number, since it is larger than the sum of its proper divisors (20028283070467).

131132121012221 is a wasteful number, since it uses less digits than its factorization.

131132121012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23001.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 131132121012221 its reverse (122210121231131), we get a palindrome (253342242243352).

The spelling of 131132121012221 in words is "one hundred thirty-one trillion, one hundred thirty-two billion, one hundred twenty-one million, twelve thousand, two hundred twenty-one".